Contact allergy to trimethylolpropane triacrylate (TMPTA) in an aziridine plastic hardener

4 workers developed hand and face dermatitis when exposed to a floor top coal. This contained a polyurethane arid a polyfunctional aziridine hardener and additives. The aziridine hardener was made by reacting propyleneimine with a polyfunctional acrylate, trimethylolpropane triacrylate (TMPTA). All 4 reacted to the hardener and to TMPTA, which is present in excess, 2 of them also reacted to pentacrythritol triacrylate (PETA), which can be used in the production of aziridine hardeners. TMPTA and PETA cross-react, and are known sensitizers in UV-hardening acrylates.
The present finding shows that well-known sensitizers can be found in hidden sources when used in a quite different chemical process.     

地尔硫治疗冠心病心绞痛180例

用随机、双盲、交叉对照法,以戊四硝酯片作为对照药,评定盐酸地尔硫(艹卓)治疗冠心病心绞痛180例的疗效。显示用中等剂量、1个月的疗程,症状总有效率为94.9％,静息心电图总有效率为49.7％,心电图运动试验总有效率为52.2％.此外心率减慢、血压降低、心率收缩压二重乘积和左心室收缩时间间期改善,全血粘度和血小板聚集可能降低。而不良反应发生率不高。经配对X~2检验,其效果优于戊四硝酯片。     

Comparative vasodilator effects of nitroglycerin,pentaerythritol trinitrate and biometabolites,and other organic nitrates

Previous studies in man have shown pentaerythritol (PE) trinitrate, given either sublingually or orally, produces a prolonged hypotensive effect. The coronary vasodilator and systemic vasoddepressor activities of PE trinitrate and its metabolites, PE dinitrate, PE mononitrate and PE, were evaluated in dogs to determine whether the metabolites were active and contributory. Coronary vasodilator activity was estimated with a flow transducer placed on the left anterior descending artery, and reduction of arterial pressure was determined directly via the femoral artery. Quantitative comparisons were made from dose—response curves established for nitroglycerin (NG), PE nitrates, and other common organic nitrates after intrajugular administration. Increase of coronary blood flow and reduction of arterial pressure were proportionally related, and the proportionality was the same for all drugs. Relative to NG, the potency of PE trinitrate was about 20%, erythrityl tetranitrate 12%, and isosorbide dinitrate 3.5%. The ratios of vasodilator activity of PE trinitrate and its metabolites were: PE trinitrate 100; PE dinitrate 1.5; PE mononitrate 0.5; and PE 0. Tachyphylaxis was observed after close-order injections of NG or PE trinitrate. In addition, there was cross tolerance between NG and PE trinitrate and also between PE trinitrate and its less active metabolites.     

Thermoplastic Intumescent Coatings Modified with Pentaerythritol-Occluded Carbon Nanotubes

A thermoplastic intumescent coating system (IC) based on poly(vinyl acetate) was modified by two forms of multiwalled carbon nanotubes (CNTs), i.e., by a nanofiller powder and its solid dispersions in pentaerythritol (PER-CNTs). It was revealed that only the PER-CNTs modifier allows us to obtain solvent-borne ICs with a relatively high CNTs concentration (1–3 wt. parts of CNTs/100 wt. parts of paint solids) and acceptable application viscosity. Thermal insulation time (TIT) and intumescent factor (IF) of the ICs on a steel substrate (a fire test according to a cellulosic fire curve), as well as morphology, chemical structure (by the FT-IR technique) and mechanical strength of the charred systems, were investigated. It was found that the CNTs powder decreases TIT and IF values while PER-occluded CNTs improve these parameters (e.g., +4.6 min and +102% vs. an unmodified sample, respectively). Compressive strength of the charred ICs was improved by the PER-CNTs modifier as well.     

太安染毒大鼠病理学观察

目的 研究太安对大鼠主要器官的毒作用。方法 用PETN以食用植物油为溶剂分为0,2．5,8．3,25mg／kg剂量组给大鼠灌胃,每日1次,每周6次,共90d。在45dg寸处死部分动物,其余染毒结束后处死,取其肝、肾、心、肺、脾脏、睾丸,观察其病理改变。结果 大鼠主要器官病理改变与对照组比较差异无显著件。结论 上述染毒条件下PETN未引起大鼠某些主要器官的病理改变。     

地尔硫■控释片与戊四硝酯片对老年冠心病心绞痛与收缩时间间期的疗效比较

目的：比较盐酸地尔硫控释片（下简称地片）与戊四硝酯（下简称硝片）治疗老年冠心病心绞痛的疗效及对收缩时间间期（ＳＴＩ）的影响。方法：冠心病心绞痛病人４５例（男性２９例，女性１６例；年龄６４±ｓ４ａ）以随机、双盲、交叉对照法分别先后采用地片３０～９０ｍｇ，ｐｏ，ｔｉｄ，加外观似硝片的安慰剂（淀粉）１～３片，ｐｏ，ｔｉｄ，共４ｗｋ，为治疗组；或以硝片１０～３０ｍｇ，ｐｏ，ｔｉｄ，加外观似地片的安慰剂１～３片，ｐｏ，ｔｉｄ，共４ｗｋ，为对照组。２组于４ｗｋ疗程结束时，各给２种安慰剂１ｗｋ，待体内药物排尽然后２组交叉服药４ｗｋ。结果：地片组与硝片组比较，心绞痛症状疗效分别为９６％对４２％（Ｐ＜０．０１）；心电图疗效分别为４４％对２９％（Ｐ＞０．０５）；治疗组有显著降低高血压病人的舒张压及ＰＥＰ／ＬＶＥＴ比值的作用。结论：地片对心绞痛症状疗效、对原有高血压和ＳＴＩ不正常者疗效优于硝片。     

3，4-二-O-甲基-1，2，5，6-四硝酸甘露醇酯对冠状动脉结扎大鼠心肌缺血的保护作用

 目的 研究3,4-二-O-甲基-1,2,5,6-四硝酸甘露醇酯（3,4-di-O-methyl-1,2,5,6-D-mannitol tetranitrate,DMMTN）对冠状动脉结扎所致大鼠急性心肌缺血的保护作用及其作用机制。方法 以结扎左冠状动脉前降支方法建立大鼠急性心肌缺血模型,建立假手术组、心肌梗死模型组、鲁南欣康组、DMMTN低、中、高剂量（15,30,60 mg·kg^-1）组,测定手术后不同时段心电图ST段和T段的抬高;并于手术3 h后硝基四氮唑蓝( NBT) 染色法测定心肌梗死面积;测定血清中肌酸激酶（CK）、乳酸脱氢酶（LDH）、丙二醛（MDA）和超氧化物歧化酶（SOD）。结果 DMMTN能显著缩小心肌梗死面积,抑制术后心电图ST段和T段的抬高;能显著降低CK和LDH的活力,以及MDA的含量,同时能显著提高SOD的活力。结论 DMMTN对冠状动脉结扎所致大鼠急性心肌缺血具有显著的保护作用。